Interface

Question

Looking for good practical example where we can use the concept of Interface.

Not able to get any practical good example where the usage of interface is justified.
So any example with/without interface.

Niradhip Chakraborty · Answer

if you have two objects that have this interface/abstract base class in common are they truly examples of the same thing (e.g. can you swap one for the other without any other object knowing or caring) or do they just act in some similar ways? (If it isn't clear the former scenario indicates an abstract base class and the latter indicates an interface.) Using a base class with some abstract methods enables you to put some functionality into the base class IF you're SURE it will be used the same way by all child classes. My experience is that the better answer is almost always an interface. With interfaces you would have to use composition to share common code which can be cumbersome in my opinion.

Kirtan Patel · Answer

normally in C# and Java We can not achieve Multiple inheritance like C++ but with using of Interface we can achieve multiple inheritance under C# Language interface Act { void act () ; } class Actor1 implements Act { public void act () { System.out.println ( To be or not to be ) ; } } class Actor2 implements Act { public void act () { System.out.println ( Wherefore art thou Romeo? ) ; } } public class TryOut { public static void main ( String args []) { Actor1 hamlet = new Actor1 () ; Actor2 juliet = new Actor2 () ; tryout ( hamlet ) ; tryout ( juliet ) ; } private static void tryout ( Act actor ) { actor.act () ; } } Happy Coding :)

Roei Bar · Answer

hey Interface is a concept you need to perform once you have multiple projects split around multiple developers and you do not want to create a direct binding and dependency between the projects meaning you dont want them to have to be dependent on each other since the Business Logic has changed.. hope this makes sense to you ....